Cyclone unit

Abstract

A cyclone unit capable of enhancing dust collection performance. A cyclone unit includes a cyclone unit body, a dust box and a core tube. The cyclone unit body includes a lower base, an upper base and a middle base sandwiched between the lower base and the upper base. The dust box is assembled to the cyclone unit body so as to collect dust and dirt. The core tube, having a meshed shape, is assembled to the middle base so as to be located inside the dust box. The core tube is detachable from the middle base while the upper base is assembled to the lower base.

What is claimed is: 
     
       1. A cyclone unit comprising:
 a cyclone unit body including
 a lower base, 
 an upper base assembled to the lower base, and 
 a middle base sandwiched between the lower base and the upper base, the middle base having a through hole; 
 
 an inner tube having a larger diameter than the through hole to surround the through hole, the inner tube extending downward from the middle base; 
 a dust box assembled to the cyclone unit body so as to collect dust and dirt; and 
 a core tube having a plurality of minute holes, the core tube being assembled to the middle base so as to be located inside the dust box, the core tube being arranged radially inside the inner tube, and the core tube being detachable from the middle base while the upper base is assembled to the lower base. 
 
     
     
       2. The cyclone unit according to  claim 1 , wherein the core tube is assemblable to the middle base by rotation thereof. 
     
     
       3. The cyclone unit according to  claim 2 , wherein
 the middle base includes
 a hooked portion formed on an edge of the through hole, 
 
 the core tube includes a hook tab, and 
 the hook tab overlaps the hooked portion by rotation of the core tube inserted into the through hole. 
 
     
     
       4. The cyclone unit according to  claim 3 , wherein the hook tab is engageable with the hooked portion. 
     
     
       5. The cyclone unit according to  claim 4 , wherein the hook tab and the hooked portion are disengaged from each other by reverse rotation of the core tube. 
     
     
       6. The cyclone unit according to  claim 1 , wherein the cyclone unit body is attachable to an end or an intermediate part of a coupling tube, the coupling tube coupling a cleaner body and a nozzle head therethrough, the cleaner body generating a suction force, the nozzle head sucking air by the suction force generated in the cleaner body. 
     
     
       7. The cyclone unit according to  claim 1 , wherein
 the core tube has a center axis aligned with a center axis of the inner tube. 
 
     
     
       8. The cyclone unit according to  claim 1 , wherein
 the plurality of minute holes are located in a lower portion of the core tube, and 
 upper minute holes of the plurality of minutes holes are located above a lower end of the inner tube. 
 
     
     
       9. The cyclone unit according to  claim 7 , wherein
 the plurality of minute holes are located in a lower portion of the core tube, and 
 upper minute holes of the plurality of minutes holes are located above a lower end of the inner tube.